Double depression: its morbidity and management in a community setting

Area of Science:

• Epidemiology
• Mental Health Research
• Public Health

Background:

• Double depression, characterized by co-occurring major depressive disorder and persistent depressive disorder (dysthymia), is linked to diminished health-related quality of life (HRQoL) and increased healthcare demands.
• Understanding the prevalence and impact of double depression is crucial for public health initiatives.

Purpose of the Study:

• To ascertain the prevalence of double depression within the general population.
• To investigate the associated morbidity and patterns of healthcare service and antidepressant utilization among individuals with double depression.

Main Methods:

• A representative sample of the South Australian general population was surveyed.
• Validated instruments including the Primary Care Evaluation of Mental Disorders (PRIME-MD) mood module, SF-36, and Assessment of Quality of Life (AQoL) were employed.
• Data on healthcare service utilization, antidepressant use, and functional impairment were collected.

Main Results:

• The prevalence of double depression was found to be 3.3% in the study population.
• Individuals with double depression exhibited significantly higher healthcare service utilization compared to those with no depression or single depressive disorders.
• Despite high antidepressant use (41.4%), average dosages and augmentation strategies were below recommended levels, indicating suboptimal pharmacological management.

Conclusions:

• Double depression is associated with increased morbidity and substantial healthcare service utilization.
• Current treatment patterns, encompassing both pharmacological and non-pharmacological interventions, appear suboptimal within the studied community sample.
• There is a clear need for improved and optimized treatment strategies for individuals with double depression.